Two-dimensional (2D) metal-organic frameworks (MOFs) are promising for electrocatalysis with high performance, as they possess large surface areas and high densities of exposed active sites. It attracts tremendous attention to obtain 2D nanostructures via simple preparation methods. Herein, a facile pyridine-modulated solvothermal synthesis of Ni/Co bimetallic MOF nanoplates (Ni_xCo_y-bpy (PyM)) is reported with well-defined 2D morphology with a thickness as thin as 20 nm and an aspect ratio larger than 50. These nanoplates possess oxygen evolution reaction activity as electrocatalysts in alkaline conditions. Specifically, Ni_0.5Co_1.5-bpy(PyM) exhibits excellent OER electrocatalytic activity with a low overpotential of 256 mV at 10 mA cm⁻² and a small Tafel slope of 81.8 mV dec⁻¹ in 1.0 mol L⁻¹ KOH with long-term electrochemical stability for 3000 cyclic voltammetry cycles. The high catalytic activity of Ni_0.5Co_1.5-bpy(PyM) can be attributed to the in situ formed active hydroxide and oxyhydroxide species within the inherited 2D morphology and the optimized bimetallic ratio.

二维（2D）金属有机骨架（MOF）有望用于高性能的电催化，因为它们具有大的表面积和高密度的暴露活性位。通过简单的制备方法获得二维纳米结构引起了极大的关注。本文报道了一种简便的吡啶调制的Ni / Co双金属MOF纳米板（Ni _x Co _y -bpy（PyM））的溶剂热合成，具有清晰的2D形态，厚度薄至20 nm，长宽比大于50这些纳米板在碱性条件下具有氧释放反应活性作为电催化剂。具体而言，Ni _0.5 Co _1.5-bpy（PyM）表现出优异的OER电催化活性，在1.0 mol L ^-1 KOH中在10 mA cm ^-2时低过电势为256 mV，在Tafel斜率较小时为81.8 mV dec ^-1，具有对3000环的长期电化学稳定性伏安循环。Ni _0.5 Co _1.5 -bpy（PyM）的高催化活性可以归因于在继承的2D形态和优化的双金属比内原位形成的活性氢氧化物和羟基氧化物。